[ppml] And as for assignments...

JORDI PALET MARTINEZ jordi.palet at consulintel.es
Sat Aug 25 11:55:36 EDT 2007

I think you don't have tried IPv6 too much ..., otherwise I don't understand
why you want to use /120.

IPv6 has features such as autoconfiguration, CGAs, privacy, etc., which need
/64 in each segment. So you don't really want to provide anything smaller
than a /64, unless we change the specs and implementations work with the new


> De: Jonathan Barker <jonathan at qx.net>
> Responder a: <ppml-bounces at arin.net>
> Fecha: Sat, 25 Aug 2007 11:33:36 -0400
> Para: ARIN PPML <ppml at arin.net>
> Asunto: [ppml] And as for assignments...
> And to create a little controversy...
> For an additional 2 cents... a /46, /52, /64 - all of these are
> excessive for a home user. Our core router can handle 1,000,000 IPv4,
> and 500,000 IPv6 routes - and that's with today's technology. Our 7613
> need not see all the routes we distribute to our DSL / Wireless
> customers. Those can / will be aggregated into blocks before they hit
> the core.. just as our aggregation routers don't see any public BGP
> routes.  From there we'll aggregate again into our /32 prefix 2607:F100
> - which is how the global Internet will see us. We'll probably end up
> assigning /120s to individual homes, where subnetting is likely to never
> occur, and multi-homing isn't a realistic possibility. I know with my
> current DirecTV, XBOX, PS3, Vista Media Centers at home all
> participating on my network, they do not like being in separate subnets.
> Everything is happiest when they do not need to go through any sort of
> routing appliance to get to each other. A single block of 256 addreses -
> that'd put every device in my house in a nice discrete container, and
> still let me add in my refrigerator, oven, lamps, water heater - what
> ever you'd actually want to assign an address to.
> That being said, even if people could assign v6 to every device in their
> home... Would you really want to? Do people really need to know or care
> that their water heater is currently on or off? Wouldn't it be a nice
> surprise to find that overnight, their water heater had been hacked -
> and it was now set to 'off' just before their morning shower?
> Personally, despite being a huge technophile who loves to use SNMP to
> graph power consumption, temperature, humidity... I really don't think I
> want my water heater on publicly addressable space.
> Assigning a /64 to a home... or 2^64th addresses... which is the number
> of IPv4 addreses available on the Internet today - SQUARED... Surely I'm
> not the only person who thinks that's just crazy. I understand the
> desire to decrease the number of routes. I can see if you have a just a
> regular Cisco sup720 you're probably worried about the health of your
> hardware due to the 256,000 IPv4 route limit - and the fact that we have
> 224,966 global BGP routes at the moment. But... isn't the best answer to
> upgrade the hardware that's causing the limit, rather than implementing
> a company-wide policy that will be deliberately wasteful forever? It's a
> whole lot easier to change out a supervisor card, and upgrade some
> aggregation routers, than to get all your customers to renumber because
> one day ARIN may realize that 2^64 addresses for a residence is a highly
> wasteful use of resources, and decides to deny an ISP's request to add
> another allocation.
> Having said all that - This e-mail has a definitely different take on
> the issue from most all the e-mails I've read.
> My question is - What is wrong with my logic, in that most people who
> are commenting don't think in these terms?
> Jonathan
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